Revenue - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Tenant accounts receivable	$ 60,250,000		$ 60,250,000		$ 58,733,000
ASU 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Accounts receivable related to tenant construction projects	5,300,000		5,300,000		5,000,000.0
Contract assets	0		0		0
Contract liabilities	0		0		0
ASU 2014-09 [Member] | COVID-19 [Member]
Disaggregation Of Revenue [Line Items]
Income recognized	100,000	$ 300,000	100,000	$ 1,000,000.0
Tenant accounts receivable					100,000
ASU 2014-09 [Member] | COVID-19 [Member] | Maximum [Member]
Disaggregation Of Revenue [Line Items]
Tenant accounts receivable	100,000		100,000
ASU 2014-09 [Member] | Various GSA - Buffalo Property [Member] | Parking Garage [Member]
Disaggregation Of Revenue [Line Items]
Income recognized	100,000	$ 100,000	200,000	$ 200,000
Tenant accounts receivable	$ 100,000		$ 100,000		$ 100,000